Revision of the Brazilian Amazon Basin species of Porphyrochroa Melander (Diptera: Empididae)
Author
Mendonça, Mirian Nascimento
Author
Rafael, José Albertino
Author
Ale-Rocha, Rosaly
text
Zootaxa
2008
1859
1
39
journal article
49073
10.5281/zenodo.183631
9f2ce723-8926-4f4c-b9f6-a4b596c8c1a9
1175-5326
183631
Porphyrochroa dactiloides
sp. nov.
(Figs. 5a–i; 18e; 20)
Diagnosis:
P. dactiloides
sp. nov.
Is closely related to
P. bifida
sp. nov.
, due to the presence of bifid apex of the cercus. It differs from the latter due to the absence of a pair of posterior projections on tergite 8 and broad lateral posterior projections on sternite 7.
Description.
Male: body length 3.0 mm; wing length
2.4 mm
.
Frons and face shiny black. Frons slightly narrower than width of anterior ocellus, subparallel sided, with 7 setae. Face slightly longer than frons, subequal in width to frons. Proboscis light-yellow, length equal to height of head. Palpus brown, with one small and almost apical seta. Ocellar tubercule with vitreous lightbrown ocellus; two proclinate ocellar setae; two proclinate postocellar setae. Antenna with scape, pedicel and flagellum brown; pruinescence clothing antenna; scape and pedicel medially verticillate; flagellum about four times longer than scape and pedicel combined. Postcranium shiny brown, with distinct brown setae and gray pruinescence; one pair of parallel vertical setae; postocellar setae distinct, arranged in complete single series with dorsal setae stronger. Gena and postgena with brown setae and pruinescence gray and sparse. Thorax
FIGURE 5.
Porphyrochroa dactiloides
sp. nov.
,
holotype
male: a, Tergites 6–8, dorsal view (not represented bristles); b, Sternites 6–8, dorsal view (not represented bristles); c, Terminalia, lateral view; d, Hypandrium, phallus, cercus and subepandrial sclerite, lateral view; e, Hypandrium, posterior view; f, Epandrium, lateral view; g, Ejaculatory apodeme, anterior view; h, Cercus, dorsal view; i, Subepandrial sclerite, ventral view. Abbreviation: a cerc, anterior cercus; cerc, cercus; ej apod, ejaculatory apodeme; goncx apod, gonocoxal apodeme; hypd, hypandrium; p cerc, posterior cercus; ph, phallus; sbepand scl, subepandrial sclerite; ST, sternite; T, tergite; vpc, ventral projection of cercus.
shiny brown, with conspicuous transverse suture gray pruinescence. Thoracic setae: 6 slender ktg; 4 sctl, larger internal pair; aprn and prepm hidden by foreleg; 2 pprn; 3 acr; 4 dc; 1 spal presut; psut spal broken; 1 npl; 1 pal. Fore and mid legs yellow from coxae to basal half of femora, remaining segments brown; hind coxae, trochanter and basal fifth of femora yellow, remaining segments brown; hind tibia with four posteroventral basal spines. All legs with short distinct setae. Wing hyaline with inconspicuous pterostigma; anal lobe wide (
Fig. 18
e). Halter brown. Abdomen shiny brown, with metallic green luster in diverse light incidence angles. Sternites brown. Tergite 7 with pair of distinct posteroventral protuberances (Fig. 5a); tergite 8 smaller than former ones, lacking protuberances (Fig. 5a); sternite 7 with two narrow lateral posterior projections (Fig. 5b); sternites 6 and 7 inclined in lateral view (Fig. 5c); sternite 8 wide (Fig. 5b). Terminalia: hypandrium without setae, with two superior projections (Figs. 5d; e). Cercus elongate in lateral view (Fig. 5d); apex bifid and internal ventral projection in dorsal view (Fig. 5h). Epandrium posteriorly projected, with long setae throughout dorsal region and short setae between long setae (Fig. 5f); ejaculatory apodeme with three projections in anterior view (Fig.
5g
); subepandrial sclerite with base shorter than arms (Fig.
5i
).
Female: Unknown.
Distribution:
BRAZIL
(Amazonas).
Type
material:
Holotype
male:
BRAZIL
,
Amazonas
, Autaz Mirim, Faz.[enda] Talismã,
1–15.xii.1994
/ Arm.[adilha] Malaise, Col. J. Bindá /
Holotype
male
Porphyrochroa dactiloides
(
INPA
)
.
Holotype
condition:
psut spal setae broken; left wing mounted on microslide in
Canada
balsam; abdomen within microvial containing glycerin. Microslide and microvial pinned attached to specimen.
Etymology:
from Greek
daktylos
= finger. It makes allusion to the epandrial shape, with digitiform projection.